The request can be rejected for some reasons:

1. There is missing promotion information you’re pending to send to your AM. The offer will remain rejected until the AM receives all the requested information.

2. It does not accept the type of traffic you want to use.

3. There is no cap left.

4. The advertiser of the offer is really restrictive, so only accept affiliates they have already worked with.

In any of these cases, you have to contact your AM for more details.